# Google Cloud Client Libraries for Rust - Long Running Operations API
**FEEDBACK WANTED:** We believe the APIs in this crate are stable, and
do not anticipate any breaking changes are needed. We are looking for
feedback before labeling the APIs "1.0". Changes (even breaking changes)
are still possible, but not expected.
We also believe the implementation is ready for production, bugs are
still possible, but not expected.
**WARNING:** some RPCs have no corresponding Rust function to call them.
Typically these are streaming RPCs. We expect adding these RPCs in a
way that does not break the existing APIs or changes their behavior in a
significant way. We do anticipate a number of new crate dependencies
will be required. If you need these RPCs please open an issue in our
GitHub repository.
Defines types and an abstract service to handle long-running operations.
[Long-running operations] are a common pattern to handle methods that may take a
significant amount of time to execute. Many Google APIs return an `Operation`
message (defined in this crate) that are roughly analogous to a future. The
operation will eventually complete, though it may still return an error on
completion. The client libraries provide helpers to simplify polling of these
operations.
> This crate used to contain a different implementation, with a different
> surface. [@yoshidan](https://github.com/yoshidan) generously donated the crate
> name to Google. Their crate continues to live as [gcloud-longrunning].
[Long-running operations]: https://google.aip.dev/151
[gcloud-longrunning]: https://crates.io/crates/gcloud-longrunning
## Quickstart
The main types to work with this crate are the clients:
- [Operations]
## More Information
- Read the [crate's documentation](https://docs.rs/google-cloud-longrunning/latest/google-cloud-longrunning)
[Operations]: https://docs.rs/google-cloud-longrunning/latest/google_cloud_longrunning/client/struct.Operations.html